CN108349342B

CN108349342B - Mounting structure of brake chamber bracket

Info

Publication number: CN108349342B
Application number: CN201680063310.5A
Authority: CN
Inventors: 川上浩祐
Original assignee: Isuzu Motors Ltd
Current assignee: Isuzu Motors Ltd
Priority date: 2015-11-09
Filing date: 2016-11-09
Publication date: 2021-08-06
Anticipated expiration: 2036-11-09
Also published as: JP2017087935A; CN108349342A; WO2017082275A1; JP6627435B2

Abstract

The invention provides a mounting structure of a brake chamber bracket, which can ensure the installation space of the brake chamber bracket on both sides of the axle direction of a suspension bracket, wherein an axle housing is configured in a mode that the length direction is set to the axle direction, the suspension bracket is welded on the central part of the axle housing, the brake chamber bracket is welded on the axle housing and is used for installing a brake chamber, and in the brake chamber bracket, the brake chamber bracket is welded on the suspension bracket, thereby integrating the brake chamber bracket and the suspension bracket.

Description

Mounting structure of brake chamber bracket

Technical Field

The invention relates to a mounting structure of a brake chamber bracket.

Background

As one of suspension systems used in a rear wheel two-axle vehicle, for example, a balanced suspension is used. The balanced suspension is suitable for reliably transmitting the driving force of an axle to a road surface, has excellent load durability, and is used in large trucks and the like. For example, a balanced suspension includes a V-shaped rod and a torsion bar that connect an axle to a vehicle body frame, and a leaf spring that absorbs vertical vibration of the axle.

Of the rear wheel axles, the rear axle is divided into a drive axle having a function of sharing the vehicle load and a function of transmitting the driving force to the axle, and a non-drive axle having only a function of sharing the vehicle load. For example, a transaxle is used for two shafts (a front shaft and a rear shaft), and a transaxle is used for the front shaft and a non-drive axle is used for the rear shaft.

For example, patent document 1 discloses that a suspension bracket (also referred to as a V-bar bracket) is welded to an upper surface of a central portion of an axle housing, and brake chamber brackets are welded to both sides of the suspension bracket in the axle direction.

The suspension bracket is connected to a pair of vehicle body frame side support brackets by a V-shaped rod. The suspension bracket is required to have high rigidity that can withstand loads in the axle direction and the vehicle front-rear direction, and is therefore manufactured, for example, by casting or forging.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2010-100248

Disclosure of Invention

Problems to be solved by the invention

In recent years, it has been proposed to manufacture a suspension bracket by press working mainly from the viewpoint of manufacturing cost.

However, in order to obtain the same rigidity as that of a suspension bracket manufactured by casting or the like, the suspension bracket manufactured by press working tends to be large in size.

Therefore, there are the following problems: the space around the suspension holder becomes narrow, and a space for installing the brake chamber holder cannot be secured on the upper surface of the axle housing, and as shown in patent document 1, there is a possibility that the brake chamber holder cannot be installed on both sides of the suspension holder in the axle direction.

The invention provides a mounting structure of a brake chamber bracket, which can ensure the installation space of the brake chamber bracket at both sides of a suspension bracket in the axle direction.

Means for solving the problems

The brake chamber bracket mounting structure of the present invention, in which an axle housing is disposed to have an elongated shape with a length direction set to an axle direction, a suspension bracket is welded to a central portion of the axle housing, and the brake chamber bracket is welded to the axle housing and is used to mount a brake chamber,

welding the brake chamber bracket to the suspension bracket, thereby integrating the brake chamber bracket with the suspension bracket.

Effects of the invention

According to the present invention, the installation space of the brake chamber bracket can be secured on both sides of the suspension bracket in the axle direction.

Drawings

Fig. 1 is a diagram of an axle housing of an embodiment of the invention viewed from the rear.

Fig. 2 is a view of an axle housing of the embodiment of the present invention, as viewed from above.

Fig. 3 is a view of the axle housing of the embodiment of the present invention as viewed from the left.

Fig. 4 is a partial perspective view of the axle housing of the embodiment of the present invention viewed from obliquely rearward.

FIG. 5A is a front view of a brake chamber bracket of an embodiment of the present invention.

FIG. 5B is a right side view of the brake chamber bracket.

FIG. 5C is a bottom view of the brake chamber bracket.

Fig. 6 is a left side view of an axle housing according to a modification of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a view of the axle housing as viewed from the rear, fig. 2 is a view of the axle housing as viewed from above, and fig. 3 is a view of the axle housing as viewed from the left. In the following description, the left-right direction means a left-right direction in a state of facing the front of the vehicle. The front-rear direction indicates the vehicle front-rear direction, the front indicates the vehicle front, and the rear indicates the vehicle rear.

As shown in fig. 1 to 3, an axle housing 3 as a main body of the non-drive axle 2 is a cylindrical shape having an elongated quadrangular cross section, and is disposed with a longitudinal direction as an axle direction. The hanger bracket 5 is welded to the upper surface center portion of the axle housing 3. The axle direction and the longitudinal direction may be referred to as a "left-right direction".

The front end of the V-shaped rod 4 of the stabilizer suspension is connected to the vehicle body frame 1 via a support bracket 1 a. A boss 41 is provided at the rear end of the V-shaped rod 4. The sleeve 41 is able to rotate about the pin 42. Through holes are provided at both ends of the pin 42. The pin 42 is fixed to the

coupling portions

53A and 53B of the suspension bracket 5 by bolts and nuts (see fig. 4). Thereby, the rear end portion (boss 41) of the V-shaped rod is coupled to the suspension bracket 5 by the pin 42.

During traveling, the axle case 3 receives loads that move relative to the vehicle body frame 1 in the up-down direction, the left-right direction, and the front-rear direction. When the axle case 3 is subjected to a load in the up-down direction, the boss 41 rotates about the pin 42, thereby allowing the up-down direction movement. On the other hand, when the axle case 3 receives loads in the left-right direction and the front-rear direction, the movements in these directions are restrained by the V-shaped rod 4. That is, during traveling, loads in the left-right direction and the front-rear direction are applied to the suspension bracket 5.

Fig. 4 is a partial perspective view of the axle case as viewed obliquely from the rear.

As shown in fig. 4, the suspension bracket 5 has the

lateral plate members

52A, 52B, the

longitudinal plate members

56L, 56R, and a pad 59.

The

lateral plate members

52A, 52B are disposed on the axle housing 3 so as to have a front-rear symmetrical shape. The horizontal plate member 52A has a bilaterally symmetrical shape, and is formed by press working such as punching, trimming, and press-bending a steel plate having a predetermined plate thickness (for example, about 6 mm).

The connecting portions 53A are provided on both left and right sides of the upper end portion of the lateral plate member 52A. A cross plate leg 54A is provided at a lower end of the cross plate member 52A. An inclined portion 55A is provided at an intermediate portion between an upper end portion and a lower end portion of the lateral plate member 52A.

The lateral plate member 52B has the same shape as the lateral plate member 52A, and is formed by press working in the same manner as the lateral plate member 52A. The connecting portions 53B are provided on both left and right sides of the upper end portion of the lateral plate member 52B. A cross plate leg 54B is provided at a lower end of the cross plate member 52B. The inclined portion 55B is provided at an intermediate portion between the upper end portion and the lower end portion of the lateral plate member 52B.

A recess into which the boss 41 is fitted is provided between the

connection portions

53A, 53A (53B ). A spacer 59 is provided between the

connection portions

53A and 53B. The

coupling portions

53A and 53B and the spacer 59 are provided with lower holes through which bolts (described above) pass. The rear end portion (boss 41) of the V-shaped rod is coupled to the

coupling portions

53A, 53B via the pin 42 by aligning these lower holes with the through-holes of the pin 42, passing a bolt through the lower holes and the through-holes, and tightening a nut on the bolt.

Inclined portion 55A is inclined obliquely forward and downward. The inclined portion 55B is inclined obliquely downward. The

inclined portions

55A, 55B and the axle housing 3 form a substantially triangular cylindrical body. Thereby, the suspension bracket 5 has high rigidity against the load in the front-rear direction.

The inclined portion 55A has a trapezoidal shape in which the width in the left-right direction of the lower portion (the lateral plate leg portion 54A) is longer than the width in the left-right direction of the upper portion (the connecting portion 53A). Left end edge 57L of inclined portion 55A is inclined obliquely downward leftward, and right end edge 57R of inclined portion 55A is inclined obliquely downward rightward. Inclined portion 55B also has a trapezoidal shape, and left end edge 57L of inclined portion 55B is inclined obliquely downward to the left, and right end edge 57R of inclined portion 55B is inclined obliquely downward to the right.

The transverse

plate leg portions

54A, 54B sandwich the axle housing 3 from front and rear and are fillet welded to the axle housing 3. In the drawings, fillet-welded portions are indicated by hatching (see fig. 1 and 2).

The

vertical plate members

56L, 56R are disposed on the left and right of the

lateral plate members

52A, 52B. The vertical plate member 56L is formed by press working such as trimming and press bending a steel plate having a predetermined plate thickness (for example, about 6 mm). The upper end portion and the intermediate portion of the vertical plate member 56L are fillet welded to the left end edge 57L of the

horizontal plate members

52A, 52B. A vertical plate leg portion 58L is provided at a lower end portion of the vertical plate member 56L, and the vertical plate leg portion 58L sandwiches the axle case 3 from front and rear and is fillet welded to the axle case 3.

The vertical plate member 56R has the same shape as the vertical plate member 56L, and is formed by press working in the same manner as the vertical plate member 56L. The upper end portion and the intermediate portion of the vertical plate member 56R are fillet welded to the right end edge 57R of the

horizontal plate members

52A, 52B. A vertical plate leg portion 58R is provided at a lower end portion of the vertical plate member 56R so as to sandwich the axle case 3 from front and rear, and the vertical plate leg portion 58R is fillet welded to the axle case 3.

As described above, the

vertical plate members

56L, 56R support the

lateral plate members

52A, 52B from the left and right, and therefore the rigidity of the suspension bracket 5 with respect to the load in the left-right direction can be improved.

If the suspension bracket 5 is increased in size or the material thickness thereof is increased in order to further increase the rigidity of the suspension bracket 5 against loads in the front-rear direction and the left-right direction, for example, the peripheral space of the suspension bracket 5 becomes narrow, and it becomes difficult to provide other members in the space.

Therefore, in the present embodiment, the rigidity of the suspension bracket 5 is improved by providing a mounting structure of the brake chamber brackets 6, 7 in which the suspension bracket 5 and the brake chamber brackets 6, 7 arranged on the left and right sides thereof are integrated.

Next, the mounting structure of the brake chamber brackets 6, 7 will be described with reference to fig. 1 to 4 and 5A to 5C. Fig. 4 is a partial perspective view of the axle housing viewed obliquely from the rear, and fig. 5A to 5C are front, right and bottom views of the brake chamber bracket.

The mounting structure of the brake chamber brackets 6 and 7 includes a structure in which the brake chamber brackets 6 and 7 are welded to the suspension bracket 5, and a structure in which these are integrally formed by press working. Here, a structure in which the brake chamber brackets 6, 7 are welded to the suspension bracket 5 will be described.

As shown in fig. 4, the brake chamber brackets 6, 7 are disposed on the right and left sides of the suspension bracket 5. The brake chamber bracket 6 is inclined along an obliquely downward inclination toward the left side of the vertical plate member 56L, and the brake chamber bracket 7 is inclined along an obliquely downward inclination toward the right side of the vertical plate member 56R. Thus, the brake chamber brackets 6, 7 are erected on the axle housing 3 so as to support the pair of

vertical plate members

56L, 56R from both the left and right sides. Since the mounting structure of the brake chamber bracket 6 and the mounting structure of the brake chamber bracket 7 are common, the following description will be made by taking the mounting structure of the brake chamber bracket 6 as a representative.

As shown in fig. 3, the brake chamber bracket 6 has a substantially U-shaped cross-sectional shape, and is disposed so that an opening in the substantially U-shaped cross-sectional shape faces forward. The brake chamber bracket 6 includes a standing wall portion 60 positioned inside the opening, an upper wall portion 62 positioned above the opening, and a lower wall portion 64 positioned below the opening. The brake chamber bracket 6 is formed by punching, trimming, press-bending, or the like, a steel plate having a predetermined plate thickness (for example, about 6 mm).

The brake chamber 8 is mounted on the upright wall portion 60 from the rear. The standing wall portion 60 is inclined forward with respect to the vertical direction at 5 to 15 degrees, for example (see fig. 3). Therefore, the rear side of the brake chamber 8 is slightly higher than the front side. When a push rod (not shown) of the brake chamber 8 is operated by a predetermined stroke along a broken line IL shown in fig. 3, the slack adjuster 82 rotates counterclockwise around the brake cam shaft 83. Thereby, the rotational force of the brake cam shaft 83 is transmitted to a brake portion (not shown), and braking force is generated.

As shown in fig. 1 and 4, the right end edge 607R of the upper end portion 602 and the intermediate portion 606 of the upright wall portion 60 except for the lower end portion 604 is fillet welded to the upper end portion and the intermediate portion of the vertical plate member 56L. The left and

right edges

607L, 607R of the lower end 604 of the standing wall portion 60 have first cut-out

portions

609L, 609R. The first cutout portion 609R is spaced apart from the lower end portion of the longitudinal plate member 56L.

As shown in fig. 4 and 5A to 5C, the upper wall portion 62 extends forward from the upper end portion 602 side of the upright wall portion 60 so as to extend along the upper end portion of the vertical plate member 56L. The right end edge 627R of the upper wall portion 62 is fillet welded to the upper end portion of the vertical plate member 56L.

The lower wall portion 64 has one end portion 642 on the lower end portion 604 side of the upright wall portion 60, and extends forward from the one end portion 642 to the other end portion 644 along the upper surface of the axle housing 3. The left end edge 647L and the right end edge 647R of the one end 542 of the lower wall portion 64 have

second notch portions

649L, 649R. The second notch portion 649L is continuous with the first notch portion 609L. The second notch portion 649R is continuous with the first notch portion 609R. The other end 644 of the lower wall portion 64 is fillet welded to the axle housing 3 (refer to fig. 2).

As shown in fig. 2 and 4, the brake chamber bracket 7 has a shape bilaterally symmetrical to the brake chamber bracket 6. The mounting structure of the brake chamber bracket 7 is the same as that of the brake chamber bracket 6 described above. That is, the brake chamber bracket 7 has the upright wall portion 70, the upper wall portion 72, and the lower wall portion 74, the upright wall portion 70 is fillet welded to the vertical plate member 56R, the upper wall portion 72 is fillet welded to the vertical plate member 56R, and the lower wall portion 74 is fillet welded to the axle case 3.

According to the mounting structure of the brake chamber brackets 6 and 7 of the above embodiment, the brake chamber brackets 6 and 7 are welded to the suspension bracket 5, and the brake chamber brackets 6 and 7 are integrated with the suspension bracket 5, whereby the installation space of the brake chamber brackets can be secured on both the left and right sides of the suspension bracket. Further, since the distance between the mounting position of the V-shaped rod 4 and the welding position of the brake chamber brackets 6, 7 is short, the rigidity of the brake chamber brackets 6, 7 in the front-rear direction and the left-right direction of the suspension bracket 5 with respect to the load applied from the V-shaped rod 4 can be improved, and the installation space of the suspension bracket 5 and the brake chamber brackets 6, 7 can be reduced.

Further, when a load in the front-rear direction and the left-right direction is applied to the

connection portions

53A, 53B of the suspension bracket 5, the brake chamber brackets 6, 7 are deformed, and fillet-welded portions of the brake chamber brackets 6, 7 are peeled off and broken. In this case, since the brake chamber brackets 6, 7 have a U-shaped cross-sectional shape and have high rigidity, and since a sufficient welding length is obtained when fillet-welding the brake chamber brackets 6, 7 with the

vertical plate members

56L, 56R and the axle housing 3, deformation of the brake chamber brackets 6, 7 can be prevented, and separation of fillet-welded portions and the like can be prevented. Thus, the brake chamber brackets 6, 7 prevent the

lateral plate members

52A, 52B from being deformed by the

vertical plate members

56L, 56R. That is, the rigidity of the suspension bracket 5 can be improved by integrating the brake chamber brackets 6 and 7 with the suspension bracket 5. Further, if the rigidity of the suspension bracket 5 is increased, the strength of the brake chamber brackets 6 and 7 welded thereto can be increased.

Further, when loads in the front-rear direction and the left-right direction are applied to the

coupling portions

53A, 53B of the suspension bracket 5, the

notches

609L, 609R, 649L, 649R are provided, so that occurrence of concentrated stress can be prevented.

In the above embodiment, the brake chamber brackets 6 and 7 have a substantially U-shaped cross-sectional shape, but the present invention is not limited thereto. In order to further increase the rigidity of the brake chamber brackets 6, 7 and further increase the rigidity of the suspension bracket 5, for example, as shown in fig. 6, the cross-sectional shape may be substantially rectangular. At this time, the through holes 60H and 66H for the brake chambers are provided in the standing

wall portions

60 and 66. The upper end portion of the opposite wall portion 66 excluding the lower end portion and the right end edge of the intermediate portion are fillet-welded to the vertical plate member 56L. A cutout is provided at the right end edge of the lower end portion of the upright wall portion 66.

The above embodiments are merely examples of the present invention, and the technical scope of the present invention should not be limited by the above embodiments. That is, the present invention can be implemented in various forms as long as it does not depart from the gist or main features thereof.

This application is based on Japanese patent application (Japanese patent application laid-open No. 2015-219655) filed on 9/11/2015, the contents of which are hereby incorporated by reference.

Industrial applicability

The invention can be widely applied to axle housings of trucks and the like.

Description of the reference numerals

1 vehicle body frame

2 non-driving bridge

3 axle housing

4V-shaped rod

5 suspension bracket

6. 7 brake chamber bracket

8 brake air chamber

52A, 52B cross plate members

56L, 56R vertical plate member

60 standing wall part

62 upper wall part

64 lower wall part

609L, 609R first incision part

649L, 649R second cut portion

Claims

1. A brake chamber bracket mounting structure in which an axle housing is disposed to have an elongated shape with a length direction set to an axle direction, a suspension bracket is welded to a central portion of the axle housing, and the brake chamber bracket is provided upright on the axle housing and mounts a brake chamber,

mounting the brake chamber bracket to the suspension bracket so as to integrate the brake chamber bracket with the suspension bracket,

the suspension bracket has:

a plate-shaped cross plate member disposed to face the front-rear direction of the vehicle and connecting the V-shaped rods of the counter suspension; and

a pair of plate-like vertical plate members disposed so as to face each other with the horizontal plate member positioned therebetween,

the brake chamber bracket has:

a plate-shaped vertical wall portion facing in a vehicle front-rear direction for mounting the brake chamber;

a plate-shaped upper wall portion that extends from an upper end portion side of the standing wall portion as a base end portion toward one of a vehicle front side and a vehicle rear side; and

a plate-like lower wall portion extending from a base end portion of the standing wall portion in the same direction as the upper wall portion, the lower wall portion having a base end portion on a lower end portion side of the standing wall portion,

one end edge in the axle direction in a range of the standing wall portion other than the lower end portion is attached to the vertical plate member,

one end edge in the axle direction of the upper wall portion is attached to the vertical plate member,

a peripheral edge of the lower wall portion in a range other than the base end portion is attached to the axle housing.

2. The brake chamber bracket mounting structure according to claim 1,

the brake chamber bracket has a substantially U-shaped cross-sectional shape, and is disposed so that an opening in the substantially U-shaped cross-sectional shape faces in the vehicle front-rear direction,

the brake chamber bracket is welded to the suspension bracket, and a portion of the brake chamber bracket welded to the suspension bracket is an end edge of the brake chamber bracket in the axle direction.

3. The brake chamber bracket mounting structure according to claim 1,

welding one end edge in the axle direction of the range of the standing wall portion except the lower end portion to the vertical plate member,

welding one end edge in the axle direction of the upper wall portion to the vertical plate member,

welding a peripheral edge of the lower wall portion in a range other than the base end portion to the axle case.

4. The brake chamber bracket mounting structure according to claim 3,

one end edge in the axle direction of the lower end portion of the standing wall portion has a cutout portion spaced apart from the vertical plate member.

5. The brake chamber bracket mounting structure according to claim 1,

the suspension bracket has:

a plate-shaped cross plate member that is provided upright on the axle housing so as to face the vehicle front-rear direction, that connects the V-shaped rod of the stabilizer suspension to the upper portion side, and that has a left end edge and a right end edge that are inclined obliquely downward so as to expand in the axle direction from the upper portion side toward the lower portion side; and

a pair of plate-shaped vertical plate members that are disposed so as to face each other with the horizontal plate member positioned therebetween and that are erected on the axle housing so as to be inclined along the inclination of the left and right edges of the horizontal plate member and to support the left and right edges of the horizontal plate member,

the brake chamber bracket is provided on both sides in the axle direction with respect to the suspension bracket, and is provided upright on the axle housing so as to be inclined along the inclination of the pair of plate-shaped vertical plate members and to support the pair of plate-shaped vertical plate members from both sides.